Platen press having curved impression member



c. F. ROOT PLATEN PRESS HAVING CURVED IMPRESSION MEMBER July 31, 1951 sShe ets-Sheet 1 ll m I Filed Sept. 2'7, 1947 July 31, 1951 c. F. ROOTPLATEN PRESS HAVING CURVED IMPRESSION MEMBER 6 Sheets-Sheet 2 FiledSept. 27, 1947 C. F. ROOT PLATEN PRESS HAVING CURVED IMPRESSION MEMBERFiled Sept. 27, 1947 July 31,1951

6 Sheets-Sheet 5 C. F. ROOT Jul 31,.19si

PLATEN PRESS HAVING CURVED IMPRESSION MEMBER 6 Shets-Sheet 4 Filed Sept.27, 1947 July 31, 1951 c. F. ROOT PLATEN PRESS HAVING CURVED IMPRESSIONMEMBER 6 Sheets-Sheet 6 Filed Sept. 27, 1947 CfzarZga z yaflj PatentedJuly 31, 1951 UNITED STATES PATENT OFFICE PLATEN PRESS HAVING CURVEDIMPRESSION MEMBER Application September 27, 1947, Serial No. 776,599

' Claims.

In platen presses utilizing the curved platen principle, it has beenfound to be most practical to mount one ofthe impression members, eitherthe form carrying bed or the platen, for a pivotal or swinging movementon one of the frame members of the press. The curved platen principlemay be applied equally as well to either of the two types of jobpresses, one known to the trade as the Golding press, and the otherknown as the Gordon press. The Golding press utilizes a principle ofoperation whereinv the platen is mounted on an oscillating frame formovement toward the form bed on a stationary frame. The Gordon press, onthe other hand, mounts the platen on an oscillating rocker on thestationary part of the press, and the form bed on the oscillating framemember.

The curved platen principle may be utilized in these presses whether theform bed or the curved platen is mounted for pivotal or swinging move-.ment. In actual practice it has been found most satisfactory to applythe curved platen principle to a Gordon type of press.

It has also been found in the operation of these curved platen pressesthat when the two impression members come together and contact eachother at the initial printing position, and at high speeds, a bump orjarring occurs. While this bump or jarring of the press does not affectthe working or impression operation, it becomes necessary to operate thepress at a slower speed; the vibrations and noise are, nevertheless,objectionable and should be avoided if possible.

It is, therefore, the principal object of the present invention toprovide a platen press using thev curved platen principle whereinmechanism is utilized 'to cause the impression members to contact eachother at the initial impression position in a smooth and quiet manner,thus permitting greater speed in operation of the machine.

Another object of the invention is to provide a curved platen presswherein one of the impression members is mounted for swinging movementbetween'the initial and final impression positions" thereof. Mechanismis also provided for controlling the swinging movement of the oneimpression member in such a way that it will contact the otherimpression member in a smooth and quiet manner.

A further object of the invention is to provide a curved platen presswherein a swingably mounted impression member is caused to move in" adirection away from the other impression member prior to the initialprinting position thereof, so that when actual impression contact ismade between the. two impression. members there will. be no jarring orbump or noise of the members.

Still another and more specific object of the invention is to provide acurved platen press wherein one of the impression members is swingablymounted on a carrier frame. Mechanism is also provided for, moving theswingable member toward the other impression member to a point beyondthe initial impression position thereof. The mechanism then provides fora return or receding movement of the swinging member in a direction awayfrom the other impression member so that it will be in motion at thetime impression contact is made between the two members.

Other objects and advantages of the invention will become apparent uponreading the following description taken in conjunction with theaccompanying drawings in which:

Fig. 1 is a side elevational view showing the upper part of a Gordonpress wherein the form bed is swingably mounted on an oscillating frame,showing the form bed in its extreme forward position;

Fig. 2' is a skeleton view of the parts shown in Fig. 1 showing theseparts in a slightly different position wherein the form bed is partiallyreceded;

Fig. 3 is a view similar .to Fig. 1 but showing the type bed in a stillfurther receded position where it assumes the initial impressionposition thereof; Fig. 4 is a view similar to Fig. l but showing thevarious parts in the final printing position thereof;

Fig. 5 is a side elevational view of the top portion of a Gordon presswherein the curvedmaten member is swingably mounted on the stationaryframe of the press, and showing the platen in its fully extendedposition; and

6 is a view similar to Fig. 5 showing the platen partially receded whereit assumes its initial printing position. I 7

As stated, above, the curved platen principle may be utilized witheither a. Goldingor a Gordon type of press, as well as on various othertypes, the present drawings illustrating, by way of example only, theapplication of the curved platen principle to a Gordon press.Furthermore, in utilizing the curved platen principle where one of theimpression members is pivoted for a swingirig movement on its carrierframe, the principle involved is the same whetherthe pivoted. member isthe bed carryingthe for'mporthe curved platen. The present invention isadapted for use with either type of machine and for purposes ofillustration, Figs. 1 to 4 illustrate a Gordon press where the form bedis the pivoted impression member, while-Figs. and 6 illustrate the sameprinciple of this invention as applied to a machine where the curvedplaten is the pivoted impression member.

It is to be noted still further that the pivoted or swinging form bedmay also assume a number of different specific forms, and for thepurpose of illustrating the invention as applied to a swinging form bed,I have utilized the construction shown in my copending application filedApril 23, 1947 bearing Serial No. 743,427 which matured into Patent No.2,497,801 February 14, 1950. Likewise, the swinging curved platen mayalso involve many different types of specific mechanism, the particularmachine which I have chosen to illustrate the principle of the presentinvention as applied to a swinging curved platen is that type which hasbeen illustrated in my copending application filed March 12, 1947bearing Serial No. 734,056 which matured into Patent No. 2,497,800February 14, 1950.

The details of operation of these two forms of curved platen presses areamply set forth in the above referred to applications, and only so muchof the construction has been illustrated herein as is necessary for acomplete understanding of the present invention.

While platen presses are used primarily for printing purposes, the bedcarrying the form is adapted to carry a type form, a cutting andcreasing fofm, or an embossing form. The invention, therefore, is notlimited to use in connection with a printing or type form.

Referring first to Figs. 1 to 4, the usual Gordon press is provided witha main stationary frame I and an oscillating frame 2. The oscillatingframe 2 is pivotally mounted on the main stationary frame foroscillation toward and away therefrom. The oscillating frame carries theform bed and the stationary frame carries the well known to thoseskilled in the art and it is sufiicient to state here that the machineis provided with a main drive shaft 6 having a pinion "I thereon todrive a large gear 8 at one side of the machine. The gear 8 is keyed toa shaft 9 provided with a rocker arm (not shown) having a cam rollerthereon which follows a cam track (also not shown) on the inner side ofthe gear 8. The, construction is such that rotation of the gear 8 willcause a rocking movement of the rock shaft 5 which carries with it theplaten 3. Thus, the platenwill be rocked or oscillated to an opensubstantially horizontal position for receiving a sheet to be printed,scored or embossed, and then back to its impression position shown inFig. 1.

The rock shaft 5 has a forwardly extending rocker extension l0 securedto or integral therewith andtvhich terminates in a locking end portionII. A rocker lock I2 is actuated at a predetermined time to move beneaththe end ll of the rocker extension I0 so that the platen 3 will belocked in position at the time of impression.

The form bed [3 is adapted to carry a form l4 within the confines of achase I5. Movement of the oscillating frame 2 to carry the form bed I3toward and away from the platen 3 is accomplished by means of a pair oflinks I6, one located at each side of the machine. The rear end of eachlink I6 is pivotally mounted to the oscillating frame by means such as apivot pin 11, andone of the links it at its forward end is pivotallymounted on the'wrist pin [8 secured to the large gear 8. The oppositeside of the machine, not illustrated herein, may be provided with asimilar gear or it may have what is known as a small head mounted on theopposite end of shaft 9. The other link I5 is mounted at its forward endto this small head. The gear 8 and small head will rotate in a clockwisedirection as viewed in the drawings, and will thereby pro duce alongitudinal reciprocation of the links it for moving and oscillatingthe frame 2 carrying the type bed I3. All of this construction thus faris conventional.

In this form of the'invention, the form bed I3 is floatingly mounted onthe oscillating frame 2 bymeans which includes upwardly extending earsI9 at each side of the form bed. Each ear I9 has a substantiallyvertically extending elongated slot 20 therein to receive a pin orroller 2| extending inwardly from the sides of the oscillating frame.

The lower end of the type bed I3 is provided at each side thereof with arearwardly extending ear 22. Each of these ears 22 has an arcuate slot23 therein to receive a pin or roller 24 also mounted on the sidemembers of the oscillating frame. The upper and lower pin and slotconnections 20, 2|, 23 and 24 provide a floating mounting for the typebed I3 and are arranged in a predetermined manner with respect to eachother and with respect to the pivotal point of the oscillating frame, sothat proper registry will occur between the type form and the curvedplaten during the printing operation.

The rear edge or face of each of the ears 22 provides a cam surface 25which cooperates with suitable actuating mechanism to control theswinging movement of the form bed. This mechanism controls the form bedby swinging it not only to its fully extended position, but also betweenthe initial and final impression positions thereof. This actuatingmechanism includes a cam roller '26 mounted on an arm 21 at each side ofthe machine. The roller 26 is adapted to move upwardly and downwardlyalong the cam surface 25 at each side of the machine. Each arm 21 ispivoted at its rear end to the oscillating frame by means of a pivot pin28. Another cam roller 29 at the forward end of the arm 27 is adapted tofollow a cam surface 30 at the rear end of an arm 3|. The arm 3| ispivotally mounted at 32 between its ends on the stationary frame I. Theforwardly extending portion 33 of the arm 3| carries a cam roller 34 atits outer end, which roller is adapted to follow the cam surface of thecam 35 mounted on the shaft 9. A coiled tension spring 36 is provided atthe rear of arm 31 to maintain the roller 34 in contact with the cam 35at all times. Other springs 3! are secured between the sides of theoscillating frame 2 and to pins 38 at the rear of the form bed I3 fornormally urging the form bed to its innermost or final printingposition.

The construction thus far is similar in many respects to my abovereferred to copending application Serial No. 743,427, but an importantdifference resides in the actuating mechanism for controlling theswinging movement of the form bed I3. The slot 23 in each of the ears 22is of such length as to permit movement of the form bed I3 toward theplaten to a point beyond the initial impression position of the formbed. The other parts of the machanism including cam 35, arm 3 l, rollers26 and 29, and the cam surface are all so arranged and constructed as topermit and control this extended movement of the swinging type bed It.

It will be observed that the oscillating frame as shown in Fig. l is inmotion carrying the form bed l3 toward the right and toward the platen3. This fact will be more clearly brought out by noting the position ofthe forward end of the link i6. A line drawn from the center of shaft tthrough the center of wrist pin it at the forward end of link iii willform an angle with the vertical of about 57 at this point. Theoscillating frame 2 will not reach its complete forward position untilthe wrist pin it is at dead center with respect to the shaft 9. At thispoint the various parts will have completed the printing operation, seeFig. 4.

It is further evident that in the initial printing position of thevarious parts as shown in Fig. 3, the wrist pin l8 at the forward end ofthelink It will be in a position which is about 71 from'the vertical.Thus, the bed it will be moved to its extreme forward position when thewrist pin l8 forms an angle of approximately 57 with the vertical, andis in its initial printing position when this same angle reaches about71".

During the movement of the wrist pin l8 from its 57 position to its 71position, the oscillating frame 2 will be moving forwardly toward theright, but the form bed is will be moving rearwardly, toward the left,or will be receding in a direction away from the platen 3. bed has acompound movement. Fig. 2 illustrates an intermediate position of thevarious parts between the extreme forward position of the form bed andthe initial printing position thereof, wherein the angle between thewrist pin l8 and the vertical is shown as being about 64.

As stated heretofore, if the form bed It is moved outwardly only to itsinitial printing position and is then held in that position so that itwill be motionless with respect to the oscillating frame at the time itcontacts the curved surface of the platen, a bump or jarring will occurwhen the press is running at high speeds. To overcome this objectionablefeature, the form bed E3 is first moved beyond its initial printingposition, and is then caused to recede or move toward the left (Figs. 1to 4) so that it will be moving in a direction away from the platen withrespect to frame 2, while the oscillating frame 2 is simultaneouslycarrying the form bed toward the platen. This may be further illustratedby noting the relative positions of the cam 35, pin and slot 24 and 23and the rollers 26 and 29 as illustrated in Figs. 1, 2 and 3respectively. The cam is moving in a clockwise direction so that fromthe extreme forward position of the form bed 13 the cam roller M willpermit the arm 3! to movein a counter-clockwise direction, thus allowingthe springs 37 to move the bed l3 rearwardly against the rollers 26. Therollers 26 will gradually move downwardly on the cam surfaces 25.

A practical example may be given of this movement which will explain theoperation more clearly. While the figures given herein may be variedwithin wide limits they are set forth herein for purposes ofillustration only and are not intended to be limiting in any way. InFig. 1 it may be assumed that the distance between the type form and thecurved platen at'the bottom thereof Will be, say, 1% of an inch. At thispoint the oscillating frame 2 is. moving toward the platen Thus, theform and is carrying with it the formbed [3. During the time that thewrist pin it moves from the 57 position of Fig. l to the 71 position ofFig. 3, it causes the oscillating frame 2 to move forwardly a distanceof about of an inch. At the same time that this movement of theoscillating frame occurs, the form bed 13 is being pivoted about itsaxis 2! in a clockwise direction with respect to the oscillating frame2, but moves only a distance of of an inch in such direction. Analyzingthese facts, it will be clear that the 1 s of an inch space between thetype form and the platen which was originally present has been reducedto zero by the compound movement of the form bed l3 through of an inchmovement of bed 2. Thus, at the time contact is made between the formand the platen, the lower edge of the form will be moving in a directionaway from the. platen, while bed 2 continues forward to a position ofthe wrist pin as shown in Fig. 4, 113 to theverticah This definitelyavoids any possibility of a thud or jarring moving of the parts becausethe two. impression members are eased together.

Actually the form bed 13 does not physically move away from the platen 3from the extended position of the form to its initial printing position.With respect to the platen, the form moves toward the platen very.slowly. However, the lower end of the form movesthe of an inch to theplaten while the frame 2 which carries the form, also moves toward theplaten the of an inch. Therefore, the form is pivoted about its pivotalpoint 2| in a clockwise direction during this movement of the frame. Aclockwise rotation of the form bed It will cause the lower end thereofto move toward the left in a direction away from the platen. However,this movement of the form bed I3 in a direction away from the platen isnot as fast or as great as its movement toward the platen, so that itwilleventually reach and contact the platen.

From the position shown in Fig. 3, the impression period. will begin andprinting or other operation will take place upon further rearwardswinging movement. of the bed 13 all in the manner as set forth in mycopending application Serial No. 743,427. The final impression positionof the parts is illustrated in Fig. 4, and from this point the wrist pinis will cross its dead center position and. begin the opening movementas between the oscillating and stationary frames. 7

Figsp5 and 6 illustrate the same principle involved in Figs. 1 to 4 butthe invention is here applied to a Gordon press wherein the curvedplaten is mounted for swinging movement about an axis onthe stationaryframe in addition to itsrocking movement thereonv The two forms of theinvention are similar in that the stationary frame is indicated at l,the oscillating frame at 2, and the form bed at E3. The drive shafts 6may have the same pinion i for driving the large gear 8, andthe links itare secured in the same manner to the pivot pin ll and wrist pin 13. Theplaten, indicated at 39, has a curved surface 40 and is mounted forrocking movement on the rock shaft 5 between sheet receiving positionand printing position. The same rocker extension llihas its locking endH adapted to be locked by the rocker lock E2.

The details of operation of this form of curved platen press are fullyset forth in my above referred to copending application Serial No. 734,056.

Briefly described, it may be noted that the curved platen may have anupper longitudinal edge 4| and a bottom edge 42. The platen 39 in thiscase is mounted for a swinging movement about an imaginary axis,although the present invention may be applied equally as well to anyother form of mounting means for swinging movement of the curved platen.The axis about which the platen rotates is substantially at the pointindicated at 43. The top of the platen 39 is provided adjacent each endwith a rearwardly extending ear 44 having an arcuate bearing surface 45thereon. The carrier for the platen, which is mounted on or may be madean integral part of the rocker extension l0, includes a pair of spacedupwardly extending arms 46, the ends of which are provided with anarcuate bearing surface complementary to the surface 45 on the cars 44,whereby the cars 44 will bear thereagainst. A pair of coiled tensionsprings 41 are adapted to normally maintain the two arcuate surfaces ofthe cars 44 and ends of arms 46 in contact with each other. One end ofeach spring 4'! is suitably secured to an arm 46 and the other end to apin 48 on the rear of the platen.

A pair of downwardly extending arms 49 are also made a part of theplaten carrier. The outer end of each arm 49 carries a roller 50 adaptedto be received within an arcuate slot in rearwardly extending ears 52 atthe lower part of the platen. The outer end of each of the ears 52carries a roller 53 adapted to bear against the cam surface of a cammember 54 mounted on the shaft 9. A spring member 55 is utilized fornormally urging the platen toward the front of the machine and away fromthe form bed to maintain the platen normally in its final impressionposition.

The principle of operation of this form of the invention is identicalwith that described with respect to Figs. 1 to 4, inclusive, except thatthe swinging member is the platen instead of the form bed. In this casealso the platen is caused to be moved to sheet receiving position andback to printing position in the ordinary and well known manner. The cam54, however, is so designed as to move the bottom of the platen 39outwardly toward the type bed a predetermined distance beyond itsinitial printing position. Continued operation of the machine from theposition of the parts shown in Fig. 5 will cause the oscillating frame 2carrying the form bed I3 to continue its movement toward the platen 39.In Fig. 5 the platen is shown in its fully extended position where, asin the previous form, the distance between the type form and the platenat the lower end thereof may be on the order of of an inch. At this timethe roller 53 will be at the highest part of the cam 54 and the roller50 will be at the extreme end of the slot 5!. Also, the wrist pin [8 atthe forward end of the link [6 will be substantially 57 away from thevertical.

As the gear 8 continues to rotate and the wrist pin 18 moves downwardlyto bring the form [4 closer to the platen, the cam 54 will permit theplaten to recede away from the form. The rate of speed at which thismovement away from the form takes place will be less than the rate atwhich the form approaches the platen. Therefore, by the time the wristpin l8 reaches its position of substantially 71 from the vertical,contact will be made between the form and the platen in the initialprinting position thereof as shown in Fig. 6. The approximately of aninch space between the form and platen at its fully extended positionwill be completely taken up in the initial impression position. This isby reason of the fact that the platen 39 recedes away from the form adistance of approximately of an inch while the form. advances toward theplaten a distance of about 1% of an inch. Thus, the two impressionmembers will be moving in the same direction at the time they contacteach other, so that the contact made therebetween will be very smoothand quiet. From the initial printing position shown in Fig. 6, continuedmovement of the oscillating frame together with cam 54 will causeswinging of the platen 39 to final printing position.

In both forms of the invention, after the impression members reachinitial printing position, the remainder of the operation is like thatdescribed in my above referred to copending applications. Ample forcewill be exerted between the two members to cause impression, and themechanism is designed to produce proper registry be tween the twomembers.

From the foregoing description, and by reference to the drawingsillustrating embodiments of the invention by way of example, it will benoted that mechanism has been provided in a platen press utilizing thecurved platen principle whereby the two impression members will becaused to come together at the initial printing position thereof in amanner which is smooth and quiet and in a way which may be referred toas a feathertouch contact. There may be other ways in which this sameresult can be accomplished without departing from the spirit of theinvention. Other specific mechanism will be necessary if the inventionis applied to other specific forms, that is, difierent ways in which theswinging members are caused to move. In any case, however, the basicprinciple of causing the two impression members to move togethersmoothly and quietly will be the same. The drawings and foregoingdescription have referred specifically, by way of example, to a printingpress wherein a type form is caused to move into rolling contact withthe curved platen. It is to be understood, however, that the formmentioned in the claims is intended to include impression or workingmembers other than type forms, such as planograph or lithograph plates.It is also to be understood that the claims herein are intended toinclude forms other than those used for printing, such as, for example,cutting, creasing and embossing forms.

Changes may be made in the form, construction and arrangement of partsfrom that disclosed herein without in any way departing from the spiritof the invention or sacrificin any of the attendant advantages thereof,provided, however, that such changes fall within the scope of the claimsappended hereto.

The invention is hereby claimed as follows:

1. In a platen press, a curved platen member and a form carrying membermounted on frames for relative movement toward each other for workingimpression, means for mounting one of said members on its frame forswinging movement within a predetermined limited range about an axisadjacent the upper end thereof, and cooperating means on said one memberand on its frame for positively swinging the lower end of said onemember toward the other member when the two members are innon-impression position and additional means on said one member and itsframe oo-acting with said cooperating means for within a limited rangeabout a horizontal axis relative to the frame on which it is mounted,cooperating means on said one member and on its frame for positivelyswinging thelower end of said one member about its axis away from itsframe while the two frames are in non-impression position, andadditional means on said one member and its frame co-acting with saidcooperating means for positively moving the lower end of said one membertoward its frame from. initial impression position to final impressionposition whilein contact with the other of said members,

said last named means also moving the lower end of said swinging membertoward its frame before it reaches initial impression position at alesser rate than the two members approach each other, whereby thecontacttherebetween will be smooth and quiet.

3. A platen press comprising a stationary frame and an oscillatingframe, means for moving said oscillating frame toward and away from saidstationary frame for impression purposes, a curved platen member mountedon one of said frames, a form carrying member on the other of saidframes, means for mounting one of said members on its frame for swingingmovement within a limited range about a horizontal axis relative to theframe on which it is mounted, cooperating means on said one member andon its frame for positively swinging the lower end of said one memberabout its axis away from its frame to a point beyond the initialimpression position thereof while the two frames are in non-impressionposition, and additional means on said one member and its frameco-acting with said cooperating means for positively moving the lowerend of said one member toward its frame from initial impression positionto final impression position while in contact with the other of saidmembers, said last named means also swinging said one member in adirection toward its frame from beyond the initial impression positionthereof to initial impression position while said oscillating frame ismoving toward said stationary frame, said one member being in motiontoward its frame at the moment of contact between the two members,whereby the contact therebetween will be smooth and quiet.

4. In a platen press, a stationary frame and an oscillating frame, aform carrying member on said oscillating frame, a curved platen membermounted on said stationary frame, said oscillating frame being movabletoward said stationary frame for impression between the two members,cooperating means on said oscillating frame and said form carryingmember for mounting said form carrying member for swinging movementwithin a limited range, other cooperating means on said oscillatingframe and said form carrying member for positively swinging the lowerend of said form carrying member away from its frame within a limitedrange.

while said frames are in non-impression position to a point beyond theinitial impression. position thereof and additional means on said formcarrying member and said oscillating frame co-acting with said othercooperating means for thereafter positively swinging the lower end ofsaid form carrying member toward its frame to its initial impression.position, whereby said form carrying member will he in motion withrespect to the frame on which it is mounted in a direction away fromsaid platen member at the moment of contact therebetween.

5. In a platen press, a stationary frame and an oscillating frame, acurved platen on said stationary frame, a form bed adapted to carry aworking form on said oscillating frame, said oscillating frame beingmovable toward said stationary frame for working impression between theplaten and working form, cooperating means on said stationary frame andsaid platen for mounting said platen for swinging movement within alimited range, other cooperating means on said stationary frame and saidplaten for positively swinging the lower end of said platen away from.its frame while said frames are in non-impression position to a pointbeyond the initial impression position thereof and additional means onsaid stationary frame and said platen cc-acting with said othercooperating means for thereafter positively swinging the lower end ofsaid platen toward its frame in a direction away from said from, wherebysaid platen will be in motion in a direction away from the form at themoment of contact therebetween in the initial impression position.

6. A platen press comprising two frames movable relative to each other,means for moving one of said frames toward and away from the other ofsaid frames for impression purposes, a curved platen member mounted onone of said frames, a formv carrying member on the other of said frames,means for mounting one of said members on its frame for swingingmovement within a limited range about a horizontal axis relative to theframe on which it is mounted, cooperating means on said one member andon its frame for positively swinging the lower end of said one memberabout its axis away from its frame while the two frames are innon-impression position, and additional means on said one member and itsframe co-acting with said cooperating means for positively moving thelower end of said one member toward its frame from initial impressionposition to final impression position while in con-' tact with the otherof said members, said last named means also moving the lower end of saidswinging member toward its frame before it reaches initial impressionposition at a lesser rate than the two members approach each other,whereby the contact therebetween will be smooth and quiet.

CHARLES F. ROOT.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 796,707 Clark -1"; Aug. 8, 1905857,721 Clark June 25, 1907 1,034,083 Clark July 30, 1912 1,289,273 Root-Q Dec. 31, 1918 1,360,063 Waters Nov. 23, 1920 1374,14? Caplinger Nov.13, 1923 Certificate of Correction Patent No. 2,562,214 July 31, 1951CHARLES F. ROOT It is hereby certified that error appears in the abovenumbered patent requiring correction as follows:

In the grant, line 1, name of patentee, for Charles F. Rott read CharlesF. Root;

and that the [said Letters Patent should be read as corrected above, sothat the same may conform to the record of the case in the PatentOflice.

Signed and sealed this 18th day of'September, A. D. 1951.

THOMAS F. MURPHY,

Assistant Uommz'ssz'oner of Patents.

